The authors respond to Egilman.

Dr. Egilman highlights the need for testing of chemicals prior to their use by workers and consumption by the public [Egilman, 2014]. We agree that the demonstrated toxicity of diacetyl illustrates the need for testing and great vigilance regarding diacetyl substitutes, other flavoring chemicals, and chemicals involved in flavor manufacture, and that such an approach would better ensure the safety of workers and the public.